Malicious PDF — malware analysis report

Static analysis result for SHA-256 df55faf8bfb64054…

MALICIOUS

PDF

80.2 KB Created: 2021-07-14 09:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3452fe1f80461aeb911118d2df33a57 SHA-1: 083e12d6d76ed42426c335f2f50af1ee76116bd8 SHA-256: df55faf8bfb64054d59a9634cc0f71fd7e84c102b79ef5f7cb51faab53be6225
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=chest+and+back+dumbbell+superset+workout
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92c53f492d21a0f6b40f0/1625893971207/javascript_find_object_in_array_by_property_value.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d1ac546fd16393e42d96/1625870764936/king_place_in_chess.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7baa47be683581ce0eeec/1625799332359/75345932105.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7da3ef188817f7e0d63e/1626111395679/the_pathless_ps5_review.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e90cecdb8bb141bad89bd2/1625885932502/29813835997.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9474892abcc18c4f74bf3/1625900872333/torofiso.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed8eaf4616123fc5fcd656/1626181295410/disizadowefelupufanaxo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d613.bin
dba767cbfcc3be146a8c1e9652197c2ad8a0bdff7b96c3de0ce327941cd4bdb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 16576 bytes
font_01_sfnt_off00010146.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 16792 bytes
font_02_sfnt_off0001195d.bin
db3fc6c95fd02224bf640e4aca290975012de9acb242b22789f0d9f18a4d0593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1195D 11136 bytes

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